oops, my bad. i meant simply just te37. but isnt there a lot of different verisons for it? like time attack, seibon edition, limited, etc etc?

Mostly just different colors. Some special editions are either lighter, stronger, or both. Honestly though, these wheels are so good in their standard trim that any extra differences are largely negligible.

The biggest difference would be the TE37 versus the TE37 G2 (aka just G2), since that's the first generation vs. second generation of the wheel. And in the case of TE37 versus G2, there actually is a design difference.